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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: Mol Microbiol. 2015 May 15;97(2):263–280. doi: 10.1111/mmi.13022

FIGURE 8. “Zinc-switch” model.

FIGURE 8

Competition and differential incorporation of S18-1 or S18-2 proteins into ribosomes when Zn2+ is present at high (upper panel) or at low concentration (lower panel). Line thickness represents level of expression, shift in equilibrium, or degree of incorporation into ribosomes. Unincorporated proteins are not shown in the model because they are likely degraded. This model is consistent with findings first reported for the L31 ribosomal protein in B. subtilis (Nanamiya et al., 2004).